义务教育课程标准实验教科书(浙教版)八年级科学下册第115页,有通电直导线在磁场中受到力的演示实验(如图1所示)。这是继学习了电流的磁效应后第二次进一步深入研究电和磁的关系,也是为后面的电动机学习打下基础的重要环节。电动机是封闭的机器,内部结构很少有机会看到,好奇心驱使学生想看看其中的运动原理。 Compulsory education curriculum standard experimental textbook (Zhejiang Education Edition) eighth grade science volume on the first 115 pages, there is energized straight wire in the magnetic field by the demonstration of the experiment (Figure 1). This is the second in-depth study of the relationship between electricity and magnetism after learning the magnetic effect of current, which is also an important part of laying the foundation for the following motor learning. The motor is a closed machine, the internal structure of rare opportunities to see, curiosity drives students want to see one of the movement principle.